Question

The electric current I, is amperes, in a circuit varies directly as the voltage V. When 12 volts are applied, the current is 4 amperes. What is the current when 18 volts are applied.

Answer 1

use the rule of 3 simple

for 12 V ----- 4 amperes
for 18 volts ---- x amperes
--------------------------

x = 18*4/12 = ?

Answer 2

6

Answer 3

Is my answer correct?

Answer 4

yes :)